Railroad Archives Online
- CollectionD0027 - Timothy Miller Collection
- Series007 - Spokane, Portland, and Seattle Railway
- Subseries Level 1009 - Engineering Records
- Subseries Level 2008 - Physical plant drawing
- Subseries Level 3001 - Bridges
- 1822 more...
- ItemBB028405 - Spokane, Portland and Seattle Railway Engineering Drawing: Interlock Details, Bridge 5.1 - Willamette River, North of Willbridge, Oregon, undated
- ItemBB028406 - Spokane, Portland and Seattle Railway Engineering Drawing: Interlock Details, Bridge 5.1 - Willamette River, North of Willbridge, Oregon, undated
- ItemBB028407 - Spokane, Portland and Seattle Railway Engineering Drawing: Signal Light Box, Bridge 5.1 - Willamette River, North of Willbridge, Oregon, undated
- ItemBB028408 - Spokane, Portland and Seattle Railway Engineering Drawing: Motor and Brake Supports, Bridge 5.1 - Willamette River, North of Willbridge, Oregon, undated
- ItemBB028409 - Spokane, Portland and Seattle Railway Engineering Drawing: Controller Details, Bridge 5.1 - Willamette River, North of Willbridge, Oregon, undated
- ItemBB028410 - Spokane, Portland and Seattle Railway Engineering Drawing: Span Swing Motors, Bridge 5.1 - Willamette River, North of Willbridge, Oregon, undated
- ItemBB028411 - Spokane, Portland and Seattle Railway Engineering Drawing: Controller Details, Bridge 5.1 - Willamette River, North of Willbridge, Oregon, undated
- ItemBB028412 - Spokane, Portland and Seattle Railway Engineering Drawing: Draw of Controller, Bridge 5.1 - Willamette River, North of Willbridge, Oregon, undated
- ItemBB028413 - Spokane, Portland and Seattle Railway Engineering Drawing: Sub - Base, Engine and Generator, Bridge 5.1 - Willamette River, North of Willbridge, Oregon, undated
- 2087 more...